Yasemin BİRCAN YILDIRIM, Şehriban ÇEK, Nuri BAŞUSTA, Esin ATİK

Histology and morphology of the epigonal organ with special referance to the lymphomyeloid system in rhinobatos rhinobatos

Bu çalışma Rhinobatos rhinobatos’un epigonal organının lenfomyeloid yapısını tanımlayan ilk çalışmadır. Epigonal organın morfolojik yapısı erkek ve dişilerde benzer ve stingray tip olarak sınıflandırılmıştır. Bu organ eritrosit trombosit lenfosit ve belirgin iki tip granülosit (eozinofil ve nötrofil) içermektedir. Çalışmada bazofillere rastlanmamıştır. Trombositler farklı şekillerde, görülebilir granülleri olmayan ve bazıları iğ şeklinde tespit edilmiştir. Eritrosit histolojisi kuşlarda, sürüngenlerde, kurbağalarda, kemikli ve diğer kıkırdaklı balıklarda daha önceden tanımlanmış histolojilerle benzer bulunmuştur. Granülositler muhtemelen lenfomyeloid epigonal organ içinde depolanmakta ve olgunlaşma sürecinde dolaşıma girmektedirler.

Anahtar Kelimeler:

bazofil, eozinofil, granülosit, lenfositler, plateletler, alyuvarlar, eşeylik organları, doku bilimi, nötrofil

Rhinobatos rhinobatos’ta lenfomyeloid sisteme özel epigonal organın histolojisi ve morfolojisi

The present study is the first trial to describe the structure of the lymphomyeloid epigonal organ of the Rhinobatos rhinobatos. The morphological structure of the epigonal organ was similar in males and females and it was classified as stingray type. This organ possessed erythrocytes, thrombocytes, lymphocytes and two distinct types of granulocyts (eosinophils and neutrophils). Basophils were not detected in this study. Thrombocytes were variable in shape and lacked visible granules and some of them were spindle-shaped. Erythrocyte histology was similar to that previously described in birds, reptiles, amphibians, teleost and elasmobranchs. Granulocytes were probably stored within the lymphomyeloid epigonal organ and entered the circulation on maturation.

Keywords:

basophils, eosinophils, granulocytes, lymphocytes, platelets, erythrocytes, gonads, histology, neutrophils,

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